Not really needed to go to your local gliding club to buy the maps. They are available for purchase through a multitude of online shops. And some charts are also available online for free. (US VFR maps see: http://vfrmap.com/)
1 in 4 million though? I think you mean 1: 250 000?
I do wholeheartedly agree on the advice to get some flying lessons though (glider or with a fuel-to-noise converter). It's a great way to learn WHY all that airspace regulation is there.